TIFFswab - SwabArrayOfShort, TIFFSwabArrayOfLong - byte- and bit-swapping routines
#include <tiffio.h> const unsigned char* TIFFGetBitRevTable(int reversed) void TIFFReverseBits(u_char *data, unsigned long nbytes) void TIFFSwabShort(uint16 *data) void TIFFSwabLong(uint32 *data) void TIFFSwabArrayOfShort(uint16 *data, unsigned long nshorts) void TIFFSwabArrayOfLong(uint32 *data, unsigned long nlongs)
SWAB(3TIFF) SWAB(3TIFF) NAME TIFFGetBitRevTable, TIFFReverseBits, TIFFSwabShort, TIFFSwabLong, TIFF- SwabArrayOfShort, TIFFSwabArrayOfLong - byte- and bit-swapping routines SYNOPSIS #include <tiffio.h> const unsigned char* TIFFGetBitRevTable(int reversed) void TIFFReverseBits(u_char *data, unsigned long nbytes) void TIFFSwabShort(uint16 *data) void TIFFSwabLong(uint32 *data) void TIFFSwabArrayOfShort(uint16 *data, unsigned long nshorts) void TIFFSwabArrayOfLong(uint32 *data, unsigned long nlongs) DESCRIPTION The following routines are used by the library to swap 16- and 32-bit data and to reverse the order of bits in bytes. TIFFSwabShort and TIFFSwabLong swap the bytes in a single 16-bit and 32-bit item, respectively. TIFFSwabArrayOfShort and TIFFSwabArrayOf- Long swap the bytes in an array of 16-bit and 32-bit items, respec- tively. TIFFReverseBits replaces each byte in data with the equivalent bit- reversed value. This operation is performed with a lookup table, which is returned using the TIFFGetBitRevTable function. reversed parameter specifies which table should be returned. Supply 1 if you want bit reversal table. Supply 0 to get the table that do not reverse bit val- ues. It is a lookup table that can be used as an identity function; i.e. TIFFNoBitRevTable[n] == n. DIAGNOSTICS None. SEE ALSO libtiff(3TIFF) Libtiff library home page: http://www.simplesystems.org/libtiff/ libtiff November 04, 2004 SWAB(3TIFF)